scholarly journals Rapid Prototyping of Bio-Inspired Dielectric Resonator Antennas for Sub-6 GHz Applications

Micromachines ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1046
Author(s):  
Valeria Marrocco ◽  
Vito Basile ◽  
Ilaria Marasco ◽  
Giovanni Niro ◽  
Luigi Melchiorre ◽  
...  
Keyword(s):  
Dielectric Resonator ◽  
Ground Plane ◽  
Dimensional Accuracy ◽  
Dielectric Resonator Antenna ◽  
Scattering Parameter ◽  
Dielectric Resonator Antennas ◽  
Close Proximity ◽  
Micro Features ◽  
Spiral Surface ◽  
Selection Of

Bio-inspired Dielectric Resonator Antennas (DRAs) are engaging more and more attention from the scientific community due to their exceptional wideband characteristic, which is especially desirable for the implementation of 5G communications. Nonetheless, since these antennas exhibit peculiar geometries in their micro-features, high dimensional accuracy must be accomplished via the selection of the most suitable fabrication process. In this study, the challenges to the manufacturing process presented by the wideband Spiral shell Dielectric Resonator Antenna (SsDRA), based on the Gielis superformula, are addressed. Three prototypes, made of three different photopolymer resins, were manufactured by bottom-up micro-Stereolithography (SLA). This process allows to cope with SsDRA’s fabrication criticalities, especially concerning the wavy features characterizing the thin spiral surface and the micro-features located in close proximity to the spiral origin. The assembly of the SsDRAs with a ground plane and feed probe was also accurately managed in order to guarantee reliable and repeatable measurements. The scattering parameter S11 trends were then measured by means of a Vector Network Analyzer, while the realized gains and 3D radiation diagrams were measured in the anechoic chamber. The experimental results show that all SsDRAs display relevant wideband behavior of 2 GHz at −10 dB in the sub-6 GHz range.

Cylindrical Dielectric Resonator Antenna over Soft Ground Plane

2007 ◽  
Vol 17 (1) ◽  
pp. 1-30
Author(s):  
S.H. Zainud-Deen ◽  
E. El-Deen ◽  
H.A. Sharshar ◽  
M. A. Binyamin
Keyword(s):  
Dielectric Resonator ◽  
Ground Plane ◽  
Soft Ground ◽  
Dielectric Resonator Antenna

scholarly journals Dual Strip-Excited Dielectric Resonator Antenna with Parasitic Strips for Radiation Pattern Reconfigurability

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
M. Kamran Saleem ◽  
Majeed A. S. Alkanhal ◽  
Abdel Fattah Sheta
Keyword(s):  
Radiation Pattern ◽  
Dielectric Resonator ◽  
Ground Plane ◽  
Dielectric Substrate ◽  
Open Circuit ◽  
Center Frequency ◽  
Dielectric Resonator Antenna ◽  
Excitation Scheme ◽  
Feed Network ◽  
Microstrip Feed

A novel pattern reconfigurable antenna concept utilizing rectangular dielectric resonator antenna (DRA) placed over dielectric substrate backed by a ground plane is presented. A dual strip excitation scheme is utilized and both excitation strips are connected together by means of a 50 Ω microstrip feed network placed over the substrate. The four vertical metallic parasitic strips are placed at corner of DRA each having a corresponding ground pad to provide a short/open circuit between the parasitic strip and antenna ground plane, through which a shift of90°in antenna radiation pattern in elevation plane is achieved. A fractional bandwidth of approximately 40% at center frequency of 1.6 GHz is achieved. The DRA peak realized gain in whole frequency band of operation is found to be above 4 dB. The antenna configuration along with simulation and measured results are presented.

Low-profile U-shaped DRA for ultra-wideband applications

2016 ◽  
Vol 9 (3) ◽  
pp. 621-627 ◽  
Author(s):  
Idris Messaoudene ◽  
Tayeb A. Denidni ◽  
Abdelmadjid Benghalia
Keyword(s):  
Dielectric Resonator ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Radiation Patterns ◽  
Wide Bandwidth ◽  
Operating Band ◽  
Low Profile ◽  
Measurement Results

In this paper, a microstrip-fed U-shaped dielectric resonator antenna (DRA) is simulated, designed, and fabricated. This antenna, in its simple configuration, operates from 5.45 to 10.8 GHz. To enhance its impedance bandwidth, the ground plane is first modified, which leads to an extended bandwidth from 4 to 10.8 GHz. Then by inserting a rectangular metallic patch inside the U-shaped DRA, the bandwidth is increased more to achieve an operating band from 2.65 to 10.9 GHz. To validate these results, an experimental antenna prototype is fabricated and measured. The obtained measurement results show that the proposed antenna can provide an ultra-wide bandwidth and a symmetric bidirectional radiation patterns. With these features, the proposed antenna is suitable for ultra-wideband applications.

Resonance breakdown of dielectric resonator antennas on ground plane at visible frequencies

2015 ◽  
Author(s):  
Chengjun Zou ◽  
Withawat Withayachumnankul ◽  
Longfang Zou ◽  
Christophe Fumeaux
Keyword(s):  
Dielectric Resonator ◽  
Ground Plane ◽  
Dielectric Resonator Antennas

scholarly journals Cylindrical Dielectric Resonator Antennas with Harmonic Control as an Active Antenna Radiator

2009 ◽  
Vol 2009 ◽  
pp. 1-7
Author(s):  
L. Lucci ◽  
G. Manara ◽  
P. Nepa ◽  
G. Pelosi ◽  
S. Selleri
Keyword(s):  
Dielectric Resonator ◽  
Shape Factor ◽  
Satellite Communications ◽  
Reactive Elements ◽  
Active Antenna ◽  
Dielectric Resonator Antenna ◽  
Feed System ◽  
Dielectric Resonator Antennas ◽  
Harmonic Control ◽  
Integrated Antenna

A cylindrical dielectric resonator antenna is proposed as a radiator for an active integrated antenna. Harmonic tuning, which is the key step in designing active antenna radiators, is achieved via a combination of shape factor control over the resonator and insertion of reactive elements in the feed system. Numerical simulations are carried out in a finite elements framework and a layout for the complete antenna is proposed, aimed at compactness for subsequent utilization of the radiator as an element in an active array for satellite communications.

scholarly journals Bio-Inspired Dielectric Resonator Antenna for Wideband Sub-6 GHz Range

2020 ◽  
Vol 10 (24) ◽  
pp. 8826
Author(s):  
Luigi Melchiorre ◽  
Ilaria Marasco ◽  
Giovanni Niro ◽  
Vito Basile ◽  
Valeria Marrocco ◽  
...  
Keyword(s):  
Dielectric Resonator ◽  
Technological Development ◽  
High Gain ◽  
Geometrical Parameters ◽  
Dielectric Resonator Antenna ◽  
Frequency Range ◽  
Dielectric Resonator Antennas ◽  
Antenna Performance ◽  
Rapid Production ◽  
Manufacturing Technologies

Through the years, inspiration from nature has taken the lead for technological development and improvement. This concept firmly applies to the design of the antennas, whose performances receive a relevant boost due to the implementation of bio-inspired geometries. In particular, this idea holds in the present scenario, where antennas working in the higher frequency range (5G and mm-wave), require wide bandwidth and high gain; nonetheless, ease of fabrication and rapid production still have their importance. To this aim, polymer-based 3D antennas, such as Dielectric Resonator Antennas (DRAs) have been considered as suitable for fulfilling antenna performance and fabrication requirements. Differently from numerous works related to planar-metal-based antenna development, bio-inspired DRAs for 5G and mm-wave applications are at their beginning. In this scenario, the present paper proposes the analysis and optimization of a bio-inspired Spiral shell DRA (SsDRA) implemented by means of Gielis’ superformula, with the goal of boosting the antenna bandwidth. The optimized SsDRA geometrical parameters were also determined and discussed based on its fabrication feasibility exploiting Additive Manufacturing technologies. The results proved that the SsDRA provides relevant bandwidth, about 2 GHz wide, and satisfactory gain (3.7 dBi and 5 dBi, respectively) at two different frequencies, 3.5 GHz and 5.5 GHz.

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